My girlfriend, Evie and I had been together four years; there is a big age difference between us, she is 22, I am 40. Life was good, sex was great. Yes, we experimented a little, but nothing major. One November day last year, I had to work late. I didn't mean to sneak in, but I guess I must've gone in really quietly, as when I got home to my beautiful girlfriend I was very surprised to find her, legs spread, fingering her...